[KFreddy]

Quote form Holly carburetor web site:

"There are Carburetors that are intended for use with superchargers, and have a unique capability that allows their power valves to reference the intake Manifold vacuum below the supercharger. This allows the power valve to operate as it should, based off intake Manifold vacuum. A power valve provides further enrichment to the main metering system under load (low vacuum) conditions. Without this external referencing, the power valve would be "reading" the Supercharger boost pressure, which has no bearing on the engine load."

Based on this information and if Lavelle is not using said carburetor his set up infact is not working correctly. Again whether or not his set up is working correctly it wold only affect the transmission vacuum modulator; not the transmission governor that truly affects the transmissions WOT shift points.